【摘 要】
：
The copper(Ⅱ) complexes of pyridine-3-carboxylic acid (nicotinic acid) and pyridine-2-carboxylic acid (isonicotinic acid) were synthesized, and their structure
【机 构】
：
Institute of Animal Science and Technology,Institute of Life Science
论文部分内容阅读
The copper(Ⅱ) complexes of pyridine-3-carboxylic acid (nicotinic acid) and pyridine-2-carboxylic acid (isonicotinic acid) were synthesized, and their structures were characterized by elemental analysis, infrared spectrum, powder X-ray diffraction and so on. The results show that under experimental conditions, the ligands of synthesized copper nicotinate and copper isonicotinate are coordinated simultaneity with copper(Ⅱ) via the nitrogen of pyridine group and an oxygen of carboxylic acid group to form bidentate chelates. The crystal of copper nicotinate with two six-membered chelate rings belongs to monoclinic system, while that of copper isonicotinate having two five-membered chelate rings is of triclinic system. The tests show that the biological activities, such as the improvement of feed utilization, growth, anti-oxidation ability of organism and disease-resistant power, are different when copper nicotinate, copper inicotinate, copper-lysine chelate, copper-methionine chelate and copper sulphate are added in pigs feed, respectively. Due to its higher biological activity, less pollution and lower toxicity,copper nicotinate has wide potential applications as a feed additive.
其他文献
俗话说:“民以食为天。”食品安全是体现一个国家人民生活质量和幸福指数最基本的要素。然而,近年来我国食品特别是乳品质量问题频发,严重威胁了人民的身体健康和生命安全,保
目前体育用品市场的产品同质化日趋严重的现状,与体育用品目标客户群体日益增强的个性化多样化需求形成了严重的对峙和矛盾关系,差异化成为体育用品营销创新的重要手段和途径
在知识经济时代,知识型员工作为知识的载体,在企业竞争中发挥着日益重要的作用。本文以知识型员工为研究对象,从个人因素和工作环境因素两个方面探讨知识型员工组织承诺的影
目的:探讨野生型和c.454C＞T突变型人血管内皮生长因子A(VEGFA)基因重组真核表达载体(pEGFP-VEGFA)体外表达有无差异.方法:用脂质体法将野生型和突变型pEGFP-VEGFA转染人胚胎肾
目前合同制科研人员在高校项目组中聘用现象较普遍,为高校承担并完成各类科研项目做出了一定的贡献.鉴于高校合同制科研人员管理存在的聘用简单化、无晋升可能等问题,建议采
前2个月全社会用电量低速增长。据中电联统计，1—2月全社会用电量7497亿千瓦时，同比增长6．7％，增速同比回落5．7个百分点。其中，工业用电量增长4．83％；工业用电量中，轻工业用电量下降3．85％，重
目的 探讨可溶化人羊膜液(solubilized-amnion product,SAP)、绒毛膜液(solubilized-chorial product,SCP)、全羊膜液(amniotic fluid,AF)对羊膜间充质干细胞(human amniotic
The reaction mechanism between CCl2 and armchair single-walled carbon nanotubes (ASWCNTs) (3,3) and (4,4) has been studied by semiempirical AM1 and ab initio me
A novel nickel(Ⅱ) complex with L-histidine has been synthesized and solved by single-crystal X-ray diffraction analysis at physiological pH. The title complex
A method for the determination of trace mercury in water samples by hydride generation atomic absorption spectrophotometry after cloud point extraction was prop